Finding the Fourth Proportional to 5,111.78, 7,669.07 and 1,825.21

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.78 : 7,669.07 = 1,825.21 : x
2. Step 2: Convert to fraction form
   5,111.78/7,669.07 = 1,825.21/x
3. Step 3: Cross multiply
   5,111.78x = 7,669.07 × 1,825.21
4. Step 4: Simplify right side
   5,111.78x = 13,997,615.78
5. Step 5: Solve for x
   x = 13,997,615.78/5,111.78
6. Step 6: Final answer
   x = 2,738.31